gofi

let str = "Hello. World-. About/Me \Help ";
     str.replace(/[\.\-/\\\s]/g, '')

// helpers start
const compose = (fn1, fn2) => x => fn1(fn2(x)); 

const reduceByProp = prop => a => 
  a.reduce((acc, curr) => ({ ...acc, [curr[prop]]: curr }), {});

const uniqByProp = prop => compose(Object.values, reduceByProp(prop));
// helpers end

// logic start
const uniqByLastname = uniqByProp('lastname')
const getUniqAndPrint = compose(console.log, uniqByLastname)
// logic end

// exec start
const arr = [
  {
     'name': 'anna',
     'lastname': 'petrova'
  },
    {
     'name': 'vika',
     'lastname': 'ivanova'
  },
    {
     'name': 'julia',
     'lastname': 'petrova'
  },
];
getUniqAndPrint(arr);
// exec end

const arr = [{
    'name': 'anna',
    'lastname': 'petrova'
},
    {
        'name': 'vika',
        'lastname': 'ivanova'
    },
    {
        'name': 'julia',
        'lastname': 'petrova'
    },
];
const table = {};
const res = arr.filter(({lastname}) =>(!table[lastname] && (table[lastname] = 1)));
console.log(res)

const obj = [{
    'name': 'anna',
    'lastname': 'petrova'
  },
  {
    'name': 'vika',
    'lastname': 'ivanova'
  },
  {
    'name': 'julia',
    'lastname': 'petrova'
  },
];

const res = obj.reduce((o, i) => {
  if (!o.find(v => v.lastname == i.lastname)) {
    o.push(i);
  }
  return o;
}, []);
console.log(res)

const [a, b, c, d, f, g= ''] = value.match(/\d+/g)!;

const [a, b, c, d, f, g= ''] = value.match(/\d+/g) || [];

const parseToDate = string => {
  const [day, month, year, hour, minute] = string.match(/\d+/g).map(match => parseInt(match));
  const normalizedYear = year < 2000 && year.toString().length <= 2 ? year + 2000 : year;
  const date = new Date(normalizedYear, month - 1, day, hour || 0, minute || 0);
  
  return date;
};

const strings = [
  '01 02 2003 04 05',
  '01 02 03 04 05',
  '01/02/03 04 05',
  '01-02-3 04-05',
  '23-08/2019 3 4',
  '1 1 1980 0 0',
  '2 2 0'
];

for (const string of strings) {
  const date = parseToDate(string);
  
  console.log(date.toLocaleString());
}

/**
'01.02.2003, 04:05:00'
'01.02.2003, 04:05:00'
'01.02.2003, 04:05:00'
'01.02.2003, 04:05:00'
'23.08.2019, 03:04:00'
'01.01.1980, 00:00:00'
'02.02.2000, 00:00:00'
*/

const obj = {
 '1': QWE,
 '5': ASD,
 '7' : ZXC
}

const keys = Object.keys(obj).sort();
const nextKey = keys[keys.indexOf("5")+1];

console.log(obj[nextKey])